James c



(No Model.)

' J. 0. STEAD.

STEAM GENERATOR. 7 No. 274,046, Patented Mar. 13,1883.

UNITED STATES PATENT Fines.

JAMES C STEAD, OF BROOKLYN, NEW YORK.

STEAM -e EN ERATO R.

SPECIFICATION formingpart of Letters Patent No. 274,046, dated March 13, 1883.

' Application filed January 3, 1883. (No model.) 7

To all whom it may concern Be it known that 1, JAMES (J. STEAD, of Brooklyn, in Kings county, and State of New York, have invented a certain new and useful Improyement in Steam-Generators, of which the following is a specification.

My improvement relates to steam-generators wherein there are a main shell, water-chambers near the ends of the shell, pipes establishing communication between one chamber and the water-space of the shell and the other chamber and the steam-space of the shell, and other pipes extending between the chambers.

The improvement consists in certain novel combinations of parts hereinafter described, and pointed out in the claims. In the accompanying drawings, Figure l is a longitudiiial section of a steam-generator embodying my improvement,-and, Fig. 2 is a transverse section of the same.

Similar letters of reference designate corresponding parts in both figures.

VA designates the main shell of the generator. It may be of the ordinary or other ap proved construction, and is shown as provided with a number of fiues, B, extending through its water-space, and as having a rearward exthe stearn-space.

tension,A,from its upper portion, which forms It is furnished with a steamdrum, (J.

D designates a water-ch amber arranged close to but, as here shown,'forward of the shell A.

It is provided with an opening, D, which is coincident with the doorway to the furnace E. A pipe, F, leading to the chamber D, supplies the same with feed-water. A pipe, Gr, leads from this water-chamber to the shell A, below the water-line, and' is provided with a checkvalve, G, which precludes water from passing from the chamber into the shell, but will allow water to pass from the shell intothe chamber. Pipes? extend'from this chamber to the steamspace of the shellA, Hence any steam generated in the chamber will be conveyed to the shell.

H designates a water-chamber arranged at the rear of the shell A, and extending to or nearly to the rearward extension A. It is connected with this extension A by pipes 1, extending above the water-line. I have shown it provided with a blow-oft pipe, Q. Pipes J The headers K will in either case be provided with pipes L, extending from the upper portion to the upper portion of the shellA. If the headers are not used, the pipes J may be made in sections united by T-couplings, and then pipes L will lead from the several couplings to the steam-space of the shell A. Steam generated in the pipes J passes up into the steamspaceof the shell A.

The furnace E is provided with ordinary grate-bars, a, and the products of combustion pass from the fire over a bridge-wall, M, thence rearwardly to the waterchamber H, thence upwardly under the extension A of the shell A, and thence through the lines B of the shell. Leaving these lines, they enter an ascending passage andpass over the top of the shell A to the smoke-stack.

What I claim as my invention, and desire to secure by Letters Patent, is-

. 1. In a steam-generator, the combination of a main shell, A, a water-chamber, D, near the forward end of the shell, a feed-water pipe, F,

leading to this chamber, a pipe, G, establishing communication between the chamber and the water-space of the shell, a valve, G, in this last-mentioned pipe, preventing water from passing from the chamber to the shell, but permitting it to pass from the shell to the chamber, another water-chamber, H, arranged near the rear end of the shell, pipes I, extending from this water-chamber to the steam-space of the shell, and pipes J, extending between the two water-chambers, all substantially as 2. In a'steam-generator, the combination of a main shell, A, water-chambers DH nearthe ends of the shell, a pipe, G, connecting the ICC water-chamber D with the Water-space of the a pipe or pipes, I, connecting the chamber H shell, pipes I, connecting the chamber H with with the steam-space of the shell, inclined the steam-space of the shell, pipes J, extending pipes J, extending between the chambers, and

between the Water-chambers, and a pipe, P, pipes L,in communication with the inclined 15' extending from the water-chamber D to the pipes and leading to the steam-space in the steam -space of the shell, substantially as shell, substantially as specified. specified.

3. In a steam-generator, the combination of a main shell, A, water-chambers D H near the VVit'nesses: ends of the shell, a pipe, G, connecting the T. J. KEANE, chamber D with the Water-space of the shell, JAMES R. BOWEN. 

